微波热修复石油污染土壤的影响因素研究

Influence Factors of Microwave Thermal Remediation on Soil Contaminated with Crude Oil

利用微波热修复技术快速修复原油污染的土壤。通过室内模拟试验,以灰漠土为供试土壤,将添加生物黑炭介质与微波技术相结合,达到修复土壤中石油污染的目的。在单因素试验基础上,采用Box-Behnken实验设计和响应曲面法,以生物黑炭作为外源吸波介质,对微波辐射时间、土壤含水率等因素对石油污染土壤微波热修复效果的影响进行研究。研究结果表明,微波功率为800 W,微波辐射时间10min,土壤含水率10.3%,生物黑炭添加量6.9%,为石油浓度20g/kg时土壤最佳修复条件,此时土壤中石油烃降解率达到95.76%。此外研究结果显示,土壤含水率与土壤中生物黑炭的含量在微波热修复石油污染土壤中存在显著的交互作用。

Taking gray desert soil as the tested soil,firstly the simulation experiment was conducted in the laboratory,microwave thermal remediation technology was used to rapidly remedy soil containated with crude oil,then biochar and microwave technology were connected in order to remedy soil contaminated with crude oil.Based on the single-factor test,the Box-Behnken experiment design and response surface method were used to resarch the effects of microwave irradiation time,soil moisture contednt on microwave ther-mal remediation of soil contaminated with crude oil.The result revealed that when microwave power was 800 W,microwave irradiation time was 10 min,soil moisture content was 10.3%,biochar content was 6.9%,then petrolwum hydrocarbon degradation in soil reached 95.76%.Moreover,the results showed that the soil moisture content and biochar content had significant interactions in soil contaminated with crude oil.